Pronunciation: (in-dik'shun),[key] —n. 1. a proclamation made every 15 years in the later Roman Empire, fixing the valuation of property to be used as a basis for taxation.
2. a tax based on such valuation.
3. Also called cycle of indiction. the recurring fiscal period of 15 years in the Roman Empire, long used for dating ordinary events. Cf. lustrum. 4. a specified year in this period.
5. the number indicating it.